=SUMPRODUCT(--(LEFT("00:00:00",8-LEN(A1:A10))&A1:A10))

--

HTH

RP
(remove nothere from the email address if mailing direct)


"cs78 via OfficeKB.com" <u14879@uwe wrote in message
news:55d04ccffbec0@uwe...
Hi everyone,

I'm having problems summing up a range of values. It's supposed to be time
but because the range of data was copied over from another program, 30
seconds would be displayed as ":30".

I've tried auto adding a "0" or "00" in front of it and changing the
formats
to mm:ss but the sum of the range of figures still comes up as 00:00.
Anyone
knows how I can go about summing up the total amount of time? Thanks!